This module needs to interact with the user desktop (i.e. take a screenshot) from a service context. In windows this is tricky because services are in session 0 and the user is in session 1.
We get around this by creating a subprocess
To test subprocess control in a command prompt, I think you need psexec from the pstools suite; I've been testing by:
- start -> cmd -> right click -> run as administrator
- in that administrator shell, start a new LocalSystem shell with
..\Downloads\PSTools\PsExec.exe -i -s cmd - in that system shell, my stuff works. without it, one of
WTSQueryUserTokenorWTSGetActiveConsoleSessionIdfails with 'required privilege is not held by the client' or something